Kemo M237 Universal Stereo Preamplifier 9-24 V DC Audio Module 30 dB

The Kemo M237 is a stereo audio preamplifier designed to boost the level of weak audio signals before sending them to a power amplifier. It offers approximately 30 dB of gain, improving the quality and loudness of sound from microphones, audio players, or other low-signal sources.

The module operates on a supply voltage of 9 V to 24 V DC, making it suitable for home systems, portable applications, DIY systems, and battery-powered installations. The frequency response is very wide, up to approximately 60 kHz, allowing for accurate reproduction of bass, midrange, and highs.

The input impedance is high, so as not to overload the audio source, while the output is designed to drive loads with impedances greater than 2 kΩ. Distortion remains very low, ensuring a clean and natural signal.

Thanks to its compact size, the M237 can be easily integrated into existing electronic designs or audio systems, offering an immediate improvement in signal quality.

Main features

• Stereo preamplifier with gain of approximately 30 dB

• Power supply 9-24 V DC

• Low signal distortion

• Frequency response up to approximately 60 kHz

• High input impedance

• Output suitable for loads above 2 kΩ

• Compact size and easy to integrate

• Ideal for weak audio signals and microphones

Typical applications

• Amplification of microphones and low-level audio sources

• DIY audio projects

• Portable systems and battery-powered systems

• Improving audio quality in home systems

• Pre-amplification before a power amplifier

Technical data

• Operating voltage 9 - 24 V/DC stabilized (or battery)
• Current consumption approximately 3.4 mA ± 20% at 12 V (no load)
• Frequency range approx. 8 Hz - 60 kHz, 3 dB at U out 1.5 V RMS
• Input impedance 100 kΩ
• Output load > 2 kΩ
• Amplification approximately 30 dB ± 20%
• Distortion ≤ 0.02% ± 20%
• Dimensions approx. 40 x 40 x 12 mm (without fastening straps)